The max length for TXT records is 255 chars at the moment as the data column of the dns_rr table is varchar 255. If you change that to e.g. type text in mysql on master and dns slave servers, you should be able to enter up to 64k char length.

The max length for TXT records is 255 chars at the moment as the data column of the dns_rr table is varchar 255. If you change that to e.g. type text in mysql on master and dns slave servers, you should be able to enter up to 64k char length.